On the good side, this hard-wired behavior strengthens tribal (family, friends, community) bonds and helps to ensure our survival. On the bad side, it often results in racism, prejudice, mistrust, narrow-mindedness, hatred and war. Knowing this, many of us try to avoid picking sides. We try to see the objective good and bad on all sides.
I'm not Democrat. I'm not Republican. I'm not one religion. I'm not one genre of music. I know I'll never achieve complete objectivity because I'm still attached to Mother Nature's puppet strings. However, I've learned that it's often wise to keep one's opinions to one's self. I try to follow a verse in the Bible that says, "If it offends my brother, I won't do it" (unless I just can't help myself).